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Carboxyhemoglobin |
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carboxyhemoglobin [kär¦bäk·sē¦hē·mə‚glō·bən]
(biochemistry) Carboxyhemoglobin HbCO, a compound formed by the binding of carbon monoxide (CO) to hemoglobin (Hb). Carboxyhemoglobin solutions are bright red. Their absorption spectrum has maximums at wavelengths of 570 and 539 mμ. Carboxyhemoglobin breaks down to Hb and CO 10, 000 times more slowly than does oxyhemoglobin to Hb and O2. Therefore, when CO is present in inhaled air the oxygen is gradually displaced from the hemoglobin. Even at an atmospheric CO concentration of 0.1 percent, more than half the hemoglobin in the blood is converted to carboxyhemoglobin, interfering with the transfer of O2 from the lungs to the tissues and causing carbonmonoxide poisoning. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | GEM Premier 4000 is the revolutionary analyzer (BG, Electrolytes, Metabolites, Glu, Lac, Hct, tHb, O2Hb, COHb, HHb, MetHb, and sO(sup 2)) with integrated CO-Oximetry that quickly allows consistent, accurate, lab-quality results throughout the hospital. It has been suggested that COHb causes myocardial infarction by severe generalized tissue hypoxia and a direct toxic effect on the myocardial mitochondria, in patients both with and without preexisting coronary artery disease (CAD). 1996) measured elevated blood levels of CO-hemoglobin adduct (COHb) in residents of households using coal and reported that the contribution to COHb from indoor coal combustion was larger than that from cigarette smoking. |
COHb |
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